(I found mine at Joann's)
Separate the back petal from the group and hot glue a small felt circle to the back. Careful not to apply glue over the hole in the center. Thread your needle and loop thread at double thickness with a knot at the end. Feed through the felt/hole in petal. (The felt acts as an anchor.)
Thread up through the center hole in your cluster of loose petals reattaching bottom petal to group.
Attach to clip, elastic or headband of your choice and voila! A gorgeous vintage silk flower! I played around with cutting lace petals and adding in randomly. I haven't glued them in yet as I'm still on the fence about it!
Here is another one I made using petals from two different silk flowers some brown feathers and of course a little button bling! (Buttons also from Joann's)